Method and system for correcting butt joint misalignment of large cylinder

Abstract

The invention relates to the technical field of welding, in particular to a butt-joint misalignment correction method and correction system for a large barrel. The butt-joint misalignment correction method comprises the steps that a supporting unit composed of V-shaped supporting frames is provided; the two supporting units are driven to horizontally move in the opposite direction for preliminary butt joint; the supporting state of the supporting frame to the cylinder body is changed; acquiring a pressure value through a first sensor below the first roller; and the lifting driving device connected below the supporting frames is driven to independently adjust the height of one or two supporting frames so as to change the height of the butt joint end of the corresponding barrel. The two clamping plates are rotationally butted to form the V-shaped supporting frame, the opening size of the V-shaped supporting frame is adjusted through the driver, the height of the barrel is reduced so that the barrel can be pressed on the detection rollers to apply pressure, and the height difference of the butt joint ends of the two barrels is determined based on pressure values obtained by the detection rollers on the two sides of the butt joint position. Therefore, the lifting driving device is used for finely adjusting the supporting frame so as to adjust the height of the butt joint ends of the barrels, and equal-height accurate butt joint of the two barrels is achieved.

Description

Technical Field

[0001] This invention relates to the field of welding technology, and specifically to a method and system for correcting misaligned joints in large cylindrical bodies. Background Technology

[0002] In the manufacturing of large pressure vessels, chemical equipment, and wind turbine towers, it is often necessary to butt-joint multiple sections of the cylinder and perform circumferential welding. During butt-jointing, it is essential to ensure that the end faces of adjacent cylinder sections are radially aligned to minimize misalignment. These cylinder sections are generally characterized by large diameters and high weights; therefore, they are typically butt-jointed and misaligned by being placed flat on fixed V-shaped support frames. The V-shaped structure has excellent self-centering properties, allowing the cylinder section to automatically center within the support groove. Theoretically, initial alignment of two cylinder sections can be achieved using two V-shaped support frames of the same height and angle.

[0003] However, to prevent damage to the outer wall of the cylinder during support, the inner wall of the V-shaped support frame is usually lined with rubber rollers with an elastic rubber layer. When the cylinder is heavy, the rubber layer on the surface of the rollers will compress and deform, causing slight changes in the support height. In addition, to facilitate the docking operation, the cylinder is often slightly offset towards the docking side when placed, causing the rubber roller on that side to bear greater pressure and undergo more significant deformation, thus causing the cylinder to tilt forward and backward along the axial direction, resulting in misalignment. Traditional V-shaped support frames generally do not have the ability to make secondary fine adjustments for such height deviations caused by elastic deformation, making it difficult to guarantee the final docking accuracy and affecting the welding quality. This problem is particularly prominent for large pressure vessel cylinders with thin walls and extremely high welding precision requirements.

[0004] In summary, while the existing docking method based on V-shaped support frames has the advantage of automatic alignment, the elastic deformation of the support elements themselves leads to uncontrollable deviations in the cylinder's posture, and there is a lack of effective compensation methods. Summary of the Invention

[0005] The purpose of this invention is to provide a misalignment correction system for large cylindrical bodies, in order to solve the technical problem in the prior art where the cylinder's height is difficult to correct after misalignment due to elastic deformation of the supporting material when supporting the cylinder, thus affecting the docking accuracy and welding effect.

[0006] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution:

[0007] A method for correcting misaligned joints in large cylindrical bodies includes the following steps:

[0008] S1. Two support units are provided, each of the support units including two support frames, the support frames being formed by a pair of clamps joined in a V-shape, for supporting two cylinders to be joined respectively;

[0009] S2. Drive the two support units to move horizontally towards each other, so that the ends of the two cylinders approach each other and are initially connected;

[0010] S3. After the docking is completed, change the support state of the support frame on the cylinder so that the outer walls of the docking ends of the two cylinders are pressed down on the first rollers located on both sides of the docking seam.

[0011] S4. Obtain the pressure value applied to the cylinder docking end by the first sensor set under each of the first rollers, and calculate the difference between the pressure values ​​obtained by the two first sensors.

[0012] S5. Based on the pressure difference, drive the lifting drive device connected below the support frame to independently adjust the height of one or both of the support frames to change the height of the corresponding cylinder docking end until the pressure difference approaches zero, thus completing the correction of the misaligned docking edge.

[0013] In a preferred embodiment of the present invention, in step S3, the change in support state is achieved by driving the two clamps constituting the V-shaped support clamp to rotate outward synchronously, thereby reducing their support height on the cylinder.

[0014] To address the aforementioned technical problems, the present invention further provides the following technical solution:

[0015] A correction system for implementing the above-mentioned misalignment correction method is characterized by comprising:

[0016] Base plate;

[0017] Two support units are set on the base plate at the same horizontal height. Each support unit includes two support frames set at a fixed interval, a lifting drive device that independently adjusts the height of the two support frames, and a slide rail mechanism that synchronously adjusts the two lifting drive devices. The fixed end of the lifting drive device is installed on the support slide of the slide rail mechanism, and the support frame is installed on the drive end of the lifting drive device. Each support frame is composed of a pair of clamps connected in a V-shape to form a V-shaped support structure with the connection point as the rotation fulcrum to support the cylinder to lie flat.

[0018] The detection module includes two first detection components symmetrically arranged between the two support units. Each first detection component includes a first roller and an elastic element connecting the first roller and the first sensor. The two first rollers are set at the same height.

[0019] A driver is connected to the drive end of each of the clamping plates on its outer side, for driving the same pair of clamping plates to rotate synchronously, thereby changing the V-shaped opening angle of the support frame;

[0020] Wherein, after each of the support units supports a cylinder by the two support frames, the support unit drives the two support frames to move horizontally towards the center by the support slide of the slide rail mechanism to initially connect the two cylinders;

[0021] Each of the support units synchronously adjusts the V-shaped opening angle of the two support frames through the driver to adjust the height of the two cylinders so that they respectively abut against the two first rollers and apply pressure to the two first sensors synchronously.

[0022] The lifting drive device independently adjusts the height of the corresponding support frame based on the pressure difference signal fed back by the two first sensors.

[0023] As a preferred embodiment of the present invention, a plurality of motor-driven rubber rollers are provided on the inner sidewall of the clamping plate, and the top of the rubber rollers protrudes from the inner sidewall of the clamping plate for contacting and driving the cylinder to rotate.

[0024] Furthermore, the motors of the same support unit operate synchronously.

[0025] As a preferred embodiment of the present invention, the lifting drive device includes at least one screw jack, the fixed end of the screw jack is mounted on the support slide of the slide rail mechanism via a base plate, and its driving end is connected to a lifting plate.

[0026] Furthermore, the rotating pin of the clamping plate is mounted on the lifting plate through a bearing seat, and the fixed end of the driver is rotatably connected to the lifting plate, while its driving end is rotatably connected to the outer wall of the clamping plate.

[0027] As a preferred embodiment of the present invention, the lifting drive device of each support unit includes a plurality of screw jacks arranged along the length direction of the support frame. The drive ends of the plurality of screw jacks are connected to the lifting plate, and their input ends are connected in series through couplings for synchronous driving.

[0028] As a preferred embodiment of the present invention, it further includes a second detection component, which includes a second roller, a second sensor and an elastic element disposed on the support slide of the slide rail mechanism, wherein the second roller and the first roller are located on the same height plane;

[0029] By comparing the pressure values ​​of the first sensor and the second sensor on the same side of the support unit, the tilt angle and tilt direction of the cylinder on the support frame can be determined. The lifting drive device can adjust the support frame according to the tilt angle and tilt direction to level the cylinder.

[0030] As a preferred embodiment of the present invention, the first detection component and / or the second detection component further includes a support, the support including a stand and a plate disposed on the upper end of the stand; the first sensor and the second sensor are fixed to the upper surface of the corresponding plate;

[0031] Both the first roller and the second roller are connected to the plate via guide rods. The guide rods pass vertically through holes on the plate. The first sensor and the second sensor are annular structures and are coaxially arranged with the corresponding holes on the plate. The first sensor, the second sensor, and the corresponding elastic element are sleeved on the corresponding guide rods and located between the first roller and the second roller and the plate.

[0032] In a preferred embodiment of the present invention, the actuator is a hydraulic cylinder or an electric push rod, and the first sensor and the second sensor are pressure sensors or weighing sensors.

[0033] As a preferred embodiment of the present invention, it further includes a controller, which is electrically connected to the first sensor, the second sensor, the lifting drive device, and the slide rail mechanism;

[0034] The controller is configured to:

[0035] Receive pressure data from the first sensor and / or the second sensor;

[0036] Based on the pressure difference between the two first sensors, a first control command for controlling the lifting drive device to perform height adjustment is calculated and generated.

[0037] Based on the pressure difference between the first sensor and the second sensor located on the same side, a second control command is calculated and generated to control the lifting drive device to independently adjust the support frame.

[0038] The slide rail mechanism controls the opposing movement or reverse separation of the support frames of the two support units.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] This invention employs two clamping plates that rotate and connect to form a V-shaped support frame, with a driver to adjust the size of its opening, reducing the height of the cylinder so that it can press on the detection rollers to apply pressure. Based on the pressure values ​​obtained from the detection rollers on both sides of the connection, the height difference between the connection ends of the two cylinders is determined. Then, the support frame is finely adjusted using a lifting drive device to adjust the height of the connection ends of the cylinders, achieving a precise connection of the two cylinders at the same height. Attached Figure Description

[0041] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0042] Figure 1 This is a flowchart illustrating the steps of a method for correcting misaligned joints in a large cylindrical body, as provided in an embodiment of the present invention.

[0043] Figure 2 This is a schematic diagram of the structural composition of the misalignment correction system for large cylinders provided in Embodiment 1 of the present invention;

[0044] Figure 3 This is a schematic diagram of the lifting drive device for a misalignment correction system for large cylinders provided in Embodiment 1 of the present invention.

[0045] Figure 4 This is a schematic diagram of the V-shaped support frame portion of the misalignment correction system for large cylinders provided in Embodiment 1 of the present invention;

[0046] Figure 5 This is a schematic diagram of the support structure of the misalignment correction system for large cylinders provided in Embodiment 1 of the present invention;

[0047] Figure 6 This is a schematic diagram of the structure of the misalignment correction system for large cylinders provided in Embodiment 2 of the present invention.

[0048] The labels in the diagram represent the following:

[0049] 1-Base plate; 2-Support frame; 3-Detection module; 4-Lifting drive device; 5-Slide rail mechanism; 6-Driver; 7-Bracket;

[0050] 21-Clamping plate; 22-Rubber roller; 23-Shaft seat; 31-First roller; 32-First sensor; 33-Elastic element; 34-Second roller; 35-Second sensor; 41-Screw jack; 42-Base plate; 43-Lifting plate; 51-Support slide; 71-Upright frame; 72-Plate; 73-Guide rod. Detailed Implementation

[0051] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0052] Example 1:

[0053] like Figure 2-4 As shown, the present invention provides a misalignment correction system for large cylinders, comprising: a base plate 1, two support units, a detection module 3, a driver 6, and a controller (not shown).

[0054] The base plate 1 provides a horizontal mounting foundation for the entire system. Two support units are arranged side by side on the base plate 1, each support unit supporting a large cylinder to be connected.

[0055] Each support unit includes two support frames 2 spaced at a fixed distance along the axial direction of the cylinder. The support frame 2 is the core supporting component, consisting of a pair of opposing inner sidewall clamps 21 joined in a V-shape to form a stable V-groove suitable for accommodating and supporting the cylindrical cylinder, such as... Figure 4 As shown.

[0056] Each clamping plate 21 has multiple motor-driven rubber rollers 22 arranged along its length on its inner sidewall. The top of each rubber roller 22 protrudes slightly from the inner wall plane of the clamping plate 21. All the rubber rollers 22 motors in the same support unit can be synchronously driven by a controller, thereby causing the cylinder above them to rotate around its axis, thus meeting the requirements for circumferential welding.

[0057] Each support frame 2 is connected to a lifting drive device 4 at its bottom. In this embodiment, as shown... Figure 3 As shown, the lifting drive device 4 includes two screw jacks 41 arranged along the length of the support frame 2. The fixed ends of the screw jacks 41 are mounted on a common base plate 42. The drive ends of all the screw jacks 41 are connected to a common lifting plate 43.

[0058] The input shaft of the screw jack 41 is connected in series via a coupling and driven by a servo motor (not shown) to ensure synchronous lifting. The clamping plate 21 is mounted in the bearing seat 23 fixed on the lifting plate 43 via a rotating pin at its lower end, so that the clamping plate 21 can rotate around the pin.

[0059] The cylinder end of the actuator 6 (in this embodiment, an electric push rod) is hinged to the lifting plate 43, and its push rod end is hinged to the middle of the outer wall of the corresponding clamping plate 21. By synchronously controlling the extension and retraction of the actuator 6 corresponding to a pair of clamping plates 21, the two clamping plates 21 can be synchronously retracted inward or extended outward, thereby changing the opening angle and depth of the V-shaped support groove, that is, the height of the cylinder can be adjusted.

[0060] The lifting drive device 4 (i.e., its base plate 42) of each support unit is mounted on the support slide 51 of a slide rail mechanism 5. The slide rail mechanism 5 is fixed to the base plate 1, and its drive component can drive the support slide 51 to move horizontally along the length direction of the base plate 1 (i.e., the cylinder axis). The slide rail mechanisms 5 of the two support units can work independently or in concert, enabling the cylinders on the two support units to move closer (connect) or separate in opposite directions.

[0061] The detection module 3 is positioned between the two support units, near the center of the base plate 1. It comprises two completely symmetrical first detection components. Each first detection component includes a bracket 7, a first roller 31, a first sensor 32, and an elastic element 33.

[0062] like Figure 5 As shown, the support 7 consists of a stand 71 and an upper plate 72. A first sensor 32 (such as a ring-shaped load cell) is fixedly mounted on the center of the upper surface of the plate 72. A through hole is opened in the center of the plate 72. A first roller 31 is connected to the plate 72 by a guide rod 73, which passes vertically through the through hole of the plate 72 and the center hole of the first sensor 32.

[0063] On the guide rod 73, between the first roller 31 and the plate 72, an elastic element 33 (such as a spring) and a first sensor 32 are sequentially fitted. The elastic element 33 provides preload and cushioning, allowing the first roller 31 to smoothly transmit force to the first sensor 32 when subjected to downward pressure from the cylinder, while also allowing the first roller 31 to have slight up-and-down movement to adapt to the cylinder surface. The tops of the two first rollers 31 are at the same precise horizontal plane.

[0064] Example 2:

[0065] Based on Example 1, such as Figure 6 As shown, the system also includes a second detection component. The structure of the second detection component is similar to the first detection component, including a second roller 34, a second sensor 35, an elastic element 33, and a bracket 7 with the same function. The difference is that the second detection component is not fixed to the ground; instead, its bracket 7 is directly mounted on the support slide 51 of the slide rail mechanism 5, located on the outside of one of the support frames 2 of each support unit (the side away from the joint). The top height of the second roller 34 is consistent with that of the first roller 31.

[0066] The first sensor 32, the second sensor 35, the drive motors of each lifting drive device 4, the drive motors of each slide rail mechanism 5, each driver 6, and the drive motor of the rubber roller 22 are all electrically connected to the controller.

[0067] The method for correcting misaligned edges in the mating according to embodiments of the present invention, combined with Figure 1 The process is shown below, and the specific operations are as follows:

[0068] Initial loading and support: The two large cylindrical sections to be connected are hoisted and placed onto the two support units respectively. Each cylindrical section is supported by the V-shaped grooves of the two support frames 2 of the corresponding support unit. At this time, the actuator 6 is in the retracted state, the clamping plate 21 is in the closed position, and the deep V-shaped grooves provide stable support for the cylindrical section.

[0069] Preliminary docking: The controller controls the slide rail mechanism 5 of the two support units to work synchronously, driving the two support slides 51 to move horizontally towards each other with the cylinders on them, until the docking end faces of the two cylinders are basically in contact or have a small gap, thus completing the preliminary docking.

[0070] Switch to detection mode: The controller controls all drivers 6 to retract, pulling each clamp 21 to rotate outward synchronously around its pin. The opening of the V-shaped support groove becomes larger and the depth becomes shallower, thereby reducing the support height of the support frame 2 on the cylinder.

[0071] Under the influence of gravity, the cylinder sinks slightly, and its outer wall near the docking end presses smoothly against the two first rollers 31. At the same time, the outer wall on the other side of the cylinder (away from the docking seam) presses against the corresponding second roller 34. At this time, part of the weight of the cylinder is transferred to the first sensor 32 and the second sensor 35 below through the first roller 31 and the second roller 34.

[0072] Pressure detection and differential calculation: The controller reads the pressure values ​​F1 and F2 detected by the two first sensors 32 in real time. Ideally, if the two cylinders are perfectly flush, F1 should equal F2. However, in reality, due to misalignment, F1 usually does not equal F2. The controller calculates the pressure difference ΔF = |F1 - F2| and records the side with the higher pressure (indicating that the cylinder on that side is relatively lower and bears more weight).

[0073] Closed-loop correction of misalignment: The controller generates control commands based on the magnitude and direction of ΔF. For example, if F1 > F2, it indicates that the left (corresponding to F1) cylinder docking end is lower. The controller will instruct the lifting drive device 4 corresponding to the support frame 2 closest to the docking seam in the left support unit to operate, precisely raising the height of the support frame 2.

[0074] During the lifting process, the left cylinder docking end rises accordingly, and the pressure F1 acting on the first roller 31 gradually decreases, causing ΔF to decrease as well. The controller continuously monitors ΔF, and stops adjusting when ΔF decreases to a set threshold (approaching zero). At this point, the docking ends of the two cylinders are at the same height, and the radial misalignment is corrected. The correction process can be unilateral adjustment or simultaneous reverse fine-tuning on both sides.

[0075] Cylinder posture leveling (optional step): While or after correcting misaligned edges, the controller can also read the pressure values ​​of the first sensor 32 and the second sensor 35 on the same support unit side.

[0076] For example, for the left support unit, read the pressure value F1_left from the first sensor 32 and the pressure value F2_left from the second sensor 35. If there is a significant difference between F1_left and F2_left, it indicates that the left cylinder is tilted in the length direction (axial direction) of the support unit (i.e., the cylinder generatrix is ​​not horizontal).

[0077] Based on this difference, the controller can independently control the lifting drive device 4 of the two support frames 2 of the support unit to perform differential adjustment (i.e., one rises and the other falls or the lifting and lowering amplitudes are different) until the difference between F1_left and F2_left also approaches zero, thereby realizing the local leveling of the cylinder at the support point and ensuring the correct posture of the cylinder in the docking area.

[0078] Rotation detection and circumferential correction: After correcting the misalignment at a corner (usually the lowest point or any starting point), the controller can start the motor of the rubber roller 22 on the support frame 2, driving the cylinder to slowly rotate a certain angle (e.g., 90°). After stopping, the aforementioned steps are repeated to detect and correct the misalignment and tilt at the new angle position. This cycle allows for multi-point detection and comprehensive adjustment of the entire circumferential seam, ensuring uniform quality of the circumferential seam connection.

[0079] Reset and Welding: After all misalignment corrections are completed, the controller controls the driver 6 to retract, causing the clamping plate 21 to flip inward and return to the deep V-support state, fully supporting the cylinder back on the support frame 2 and disengaging it from the first roller 31 and the second roller 34. After this, spot welding and subsequent automatic welding operations can be performed.

[0080] This invention achieves high-precision, automated misalignment correction through force sensing feedback and closed-loop control, and is especially suitable for high-quality docking requirements of large and heavy cylinders.

[0081] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A method for correcting misaligned joints in large cylindrical bodies, characterized in that, Includes the following steps: S1. Two support units are provided, each of the support units including two support frames, the support frames being formed by a pair of clamps joined in a V-shape, for supporting two cylinders to be joined respectively; S2. Drive the two support units to move horizontally towards each other, so that the ends of the two cylinders approach each other and are initially connected; S3. After the docking is completed, change the support state of the support frame on the cylinder so that the outer walls of the docking ends of the two cylinders are pressed down on the first rollers located on both sides of the docking seam. S4. Obtain the pressure value applied to the cylinder docking end by the first sensor set under each of the first rollers, and calculate the difference between the pressure values ​​obtained by the two first sensors. S5. Based on the pressure difference, drive the lifting drive device connected below the support frame to independently adjust the height of one or both of the support frames to change the height of the corresponding cylinder docking end until the pressure difference approaches zero, thus completing the correction of the misaligned docking edge.

2. The method for correcting misaligned joints in large cylindrical bodies according to claim 1, characterized in that, In step S3, the change in support state is achieved by driving the two clamps constituting the V-shaped support clamp to rotate outward synchronously, thereby reducing their support height on the cylinder.

3. A correction system for implementing the misalignment correction method according to any one of claims 1-2, characterized in that, include: Base plate (1); Two support units are set on the base plate (1) at the same horizontal height. Each support unit includes two support frames (2) set at a fixed distance, a lifting drive device (4) that independently adjusts the height of the two support frames (2), and a slide rail mechanism (5) that synchronously adjusts the two lifting drive devices (4). The fixed end of the lifting drive device (4) is installed on the support slide (51) of the slide rail mechanism (5). The support frame (2) is installed on the drive end of the lifting drive device (4). Each support frame (2) is formed by a pair of clamps (21) connected in a V-shape to form a V-shaped support structure with the connection point as the rotation fulcrum, so as to support the cylinder to lie flat. The detection module (3) includes two first detection components symmetrically arranged between the two support units. Each first detection component includes a first roller (31) and an elastic element (33) connecting the first roller and the first sensor (32). The two first rollers (31) are set at the same height. A driver (6) is connected to the drive end of the driver (6) on the outside of each of the clamps (21) to drive the same pair of clamps (21) to rotate synchronously, so as to change the V-shaped opening angle of the support frame (2); In this process, after each support unit supports a cylinder by two support frames (2), the support unit drives the two support frames (2) to move horizontally towards the center by the support slide (51) of the slide rail mechanism (5) to initially connect the two cylinders; Each of the support units synchronously adjusts the V-shaped opening angle of the two support frames (2) through the driver (6) to adjust the height of the two cylinders so that they abut against the two first rollers (31) respectively and apply pressure to the two first sensors (32) synchronously. The lifting drive device (4) independently adjusts the height of the corresponding support frame (2) based on the pressure difference signal fed back by the two first sensors (32).

4. The misalignment correction system according to claim 3, characterized in that, The inner wall of the clamping plate (21) is provided with a plurality of rubber rollers (22) driven by a motor. The top of the rubber rollers (22) protrudes from the inner wall of the clamping plate (21) and is used to contact and drive the cylinder to rotate. Furthermore, the motors of the same support unit operate synchronously.

5. A misalignment correction system according to claim 4, characterized in that, The lifting drive device (4) includes at least one screw jack (41), the fixed end of the screw jack (41) is mounted on the support slide (51) of the slide rail mechanism (5) via a base plate (42), and its drive end is connected to a lifting plate (43). The rotating pin of the clamp (21) is mounted on the lifting plate (43) through the bearing seat (23), and the fixed end of the driver (6) is rotatably connected to the lifting plate (43), while its driving end is rotatably connected to the outer wall of the clamp (21).

6. The misalignment correction system according to claim 5, characterized in that, The lifting drive device of each support unit includes a plurality of screw jacks (41) arranged along the length of the support frame (2). The drive ends of the plurality of screw jacks (41) are connected to the lifting plate (43), and their input ends are connected in series through couplings for synchronous driving.

7. A misalignment correction system according to claim 6, characterized in that, It also includes a second detection component, which includes a second roller (34), a second sensor (35) and an elastic element (33) disposed on the support slide (51) of the slide rail mechanism (5), wherein the second roller (34) and the first roller (31) are located on the same height plane; By comparing the pressure values ​​of the first sensor (32) and the second sensor (35) on the same side of the support unit, the tilt angle and tilt direction of the cylinder on the support frame (2) can be determined. The lifting drive device (4) can adjust the support frame (2) according to the tilt angle and tilt direction to level the cylinder.

8. A misalignment correction system according to claim 5, characterized in that, The first detection component and / or the second detection component further include a bracket (7), the bracket (7) including a stand (71) and a plate (72) disposed on the upper end of the stand (71); the first sensor (32) and the second sensor (35) are fixed to the upper surface of the corresponding plate (72); The first roller (31) and the second roller (34) are both connected to the plate (72) via a guide rod (73). The guide rod (73) passes vertically through the hole on the plate (72). The first sensor (32) and the second sensor (35) are annular structures and are coaxially arranged with the corresponding hole on the plate (72). The first sensor (32), the second sensor (35) and the corresponding elastic element (33) are sleeved on the corresponding guide rod (73) and located between the first roller (31) and the second roller (34) and the plate (72).

9. A misalignment correction system according to claim 7, characterized in that, The actuator is a hydraulic cylinder or an electric push rod, and the first sensor (32) and the second sensor (35) are pressure sensors or weighing sensors.

10. A misalignment correction system according to claim 9, characterized in that, It also includes a controller, which is electrically connected to the first sensor (32), the second sensor (35), the lifting drive device (4), and the slide rail mechanism (5); The controller is configured to: Receive pressure data from the first sensor (32) and / or the second sensor (35); Based on the pressure difference between the two first sensors (32), a first control command is calculated and generated for controlling the lifting drive device (4) to perform height adjustment; Based on the pressure difference between the first sensor (32) and the second sensor (35) set on the same side, a second control command is calculated and generated to control the lifting drive device (4) to independently adjust the support frame (2); The slide rail mechanism (5) is controlled to perform opposing movement or reverse separation of the support frame (2) of the two support units.

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